trichloroacetimidate through a regio- and stereoselective manner. The β-(1→3)-branched β-(1→6)-linked heptaglucose 1 and its dodecyl glycoside 2 having phytoalexin-elicitor activity were prepared using the developed strategy. Bioassays showed that the phytoalexin-elicitor activity of the dodecyl β-(1→3)-branched β-(1→6)-linked hexaglucoside 2 is slightly more than that of the corresponding reducing end free heptaglucose
采用 1,2:5,6-二-O-异亚丙基-α-D-
呋喃葡萄糖、2,3,4,6-四O-苯甲酰基-α-
D-吡喃葡萄糖基三
氯乙
酰亚胺酯和6-O-乙酰基-2,3,4-三-O-苯甲酰基-α-
D-吡喃葡萄糖基三
氯乙
酰亚胺酯通过区域选择性和立体选择性方式进行。使用开发的策略制备了具有植物抗毒素诱导剂活性的β-(1→3)-支链β-(1→6)-连接的七
葡萄糖1及其
十二烷基糖苷2。
生物测定表明,
十二烷基 β-(1→3)-支链 β-(1→6)-连接的六
葡萄糖苷 2 的植物抗毒素诱导剂活性略高于相应的还原端游离七
葡萄糖 1。